Approach-opeetihg gate



4R. BRINKERHOFF.

A Gate.

Patented YMag-yf 28. 1861.

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'UNTTED sTATEs PATENT oEEIoE.

R. BRINKERHOFF, OF MANSFIELD, OHIO.

APPROACH-OPENING GATE.

i Specification of Letters Patent No. 32,407, dated May 28, 1861.

l the following is a full and eXact description thereof, reference being had to the accompanying 'drawings and to the letters of reference marked thereon.

- Figure l is a plan View with the left hand gate removed so asV to expose the rod and hinge below, by which said gate is operated. Fig. 2 represents a skeleton perspec- .t-ive View of the working portion. a, a, a, a

is a double toggle joint formed by four bars of iron or wood united at their ends by pivots fas shown in the drawings. The double toggle joint a, a, a, a, is connected to the. levers c, c, c, c by the rods Z, and to the hinges e, c, by the rods d, CZ;

71 it, are rods passing through the heads of the pivots of the double toggle joint a, a, a., ct, and keep the same in position. The rods are rmly attached at their ends to a post or plank.

e, e are hinges connected by a pivot. at one end to the rods CZ, CZ, and at the other ends to the frame work of the gate posts 7c, 7c, in Fig. 1., and serves to move the foot of the gates in a circular direction.

s, s, are openings in the hinges e, e, in which rests a pivot from the foot of each of the gates. Each ofthe gates is beveled on the inner end, as represented in j", f in Fig. l.

The mode of operating is as -follows:

Approaching the gates from either direction the right wheel of the carriage strikes and depresses the lever c, at the right, thereby opening the gates and placing the whole apparatus in the position represented in Fig 2. The depression of the lever c, acts upon and moves the rod Z), and contracts the double toggle joint a, a., a, a. The contraction of a., a, a, a, moves the rods fl, (Z, and the hinges e, e. The foot of each of the gates resting upon pivots which pass through the openings .5?, s, is also moved forward in a circular direction as represented by slot z' in Fig. l. The foot of each gate being thrown forward the gates are pressed outward at, and by the aid of, the beveled edges, and then by their own weight swing open. Passing' through the gates the right wheel of the carriage strikes and d-epresses the lever c, at the right. The depression of the lever c moves the rod and expands the double toggle joint a, a, a, a. vThis expansion acts upon the rods d, (l, and moves the hinges c, e, back to the gate posts 7c, 7c (Fig. l). The foot of the gates being changed in position, the gates swing forward and close by their own weight.

lVhat I claim as my invention and desire to secure by Letters Patent is,

The application of the toggle joint a, a, a, a, and the hinges c, e, as represented, and for the purposes set forth.

E. BEINKEEHOEE.

lVitnesses:

J. H. PHILLIPS, A. C. TONNER. 

